National Institute for Occupational Safety and Health

“ It is an explosion risk. Hexane and isopropanol are flammable liquids. 1. Calibrate each personal sampling pump with a representative sampler in line. 2. Remove the front and rear plugs immediately before sampling and attach sampler to personal sampling pump with flexible tubing. Sample at a known flowrate between 1 and 3 L/min and collect a total smaple of 16 to 350 liters of air. 3. Cap the filters, record sample identity and all relevant sample data (duration, ambient temperature and pressure) . ”

“ Prepare blank sample filters by handling in the same manner (open, seal, and transport) as samples except that no air is sampled through the blanks. 5. Ship in suitable container with blanks.
SAMPLE PREPARATION: 6. 7.
Open the filter holder and using tweezers, transfer each mixed cellulose ester filter to an ointment jar. Add 5 mL isopropanol, cap, and swirl the jar to ensure that the filter is thoroughly wetted. ”

“ NIOSH Manual of Analytical Methods, 2nd ed., V 3, S7, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-157-B (1977) . NIOSH/OSHA Occupational Health Guidelines for Chemical Hazards, U.S. Department of Health and Human Services, Publ. ”